# 2019-2020 Azerbaijan Finals, June 17

# Corona2020

Ziya suspects that he has become infected with a coronavirus. In this regard, he conducts research on his DNA, and, as a result of calculations, finds out that three different numbers **a**, **b** and **c** are associated with his DNA. Ziya believes that if substituting in expression **a** <> **b** <> **c** instead of (**<>**) **+** or **-**, you can get number **2020**, then he did not become infected with coronavirus, otherwise, if this is not possible, he becomes infected. Help Ziya find out if he got infected with coronavirus.

#### Input

One line contains integers **a**, **b** and **c** (**1** ≤ **a**, **b**, **c** ≤ `10`

).^{8}

#### Output

If Ziya is not infected, print the expression **a** <> **b** <> **c** which yields **2020**. Otherwise print the word **CORONA**. When outputting an expression, there should not be spaces between numbers and operators.

2019 2020 2021

2019-2020+2021

2019 2020 2022

CORONA